Alberto Garcia 8e8cb375e0 block: Give always priority to unused entries in the qcow2 L2 cache ... The current algorithm to replace entries from the L2 cache gives priority to newer hits by dividing the hit count of all existing entries by two everytime there is a cache miss. However, if there are several cache misses the hit count of the existing entries can easily go down to 0. This will result in those entries being replaced even when there are others that have never been used. This problem is more noticeable with larger disk images and cache sizes, since the chances of having several misses before the cache is full are higher. If we make sure that the hit count can never go down to 0 again, unused entries will always have priority. Signed-off-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>		2015-02-06 17:24:22 +01:00
..
accounting.c	block: add accounting for merged requests	2015-02-06 17:24:21 +01:00
archipelago.c	block: Rename BlockDriverCompletionFunc to BlockCompletionFunc	2014-10-20 13:41:27 +02:00
backup.c	qmp: Add command 'blockdev-backup'	2015-01-13 11:47:56 +00:00
blkdebug.c	blkdebug: Simplify and improve filename generation	2014-12-10 10:31:11 +01:00
blkverify.c	block: Rename BlockDriverCompletionFunc to BlockCompletionFunc	2014-10-20 13:41:27 +02:00
block-backend.c	block-backend: expose bs->bl.max_transfer_length	2015-02-06 17:24:21 +01:00
bochs.c	block: Use g_new() & friends to avoid multiplying sizes	2014-08-20 11:51:28 +02:00
cloop.c	cloop: Handle failure for potentially large allocations	2014-08-15 15:07:15 +02:00
commit.c	block: let commit blockjob run in BDS AioContext	2014-11-03 11:41:49 +00:00
curl.c	block/curl: Improve type safety of s->timeout.	2014-11-03 11:41:47 +00:00
dmg.c	block/dmg: improve zeroes handling	2015-02-06 17:24:21 +01:00
gluster.c	block: don't convert file size to sector size	2014-09-12 15:43:06 +02:00
iscsi.c	block/iscsi: fix uninitialized variable	2015-01-03 09:22:13 +01:00
linux-aio.c	linux-aio: simplify removal of completed iocbs from the list	2014-12-12 16:57:55 +00:00
Makefile.objs	block/dmg: support bzip2 block entry types	2015-02-06 17:24:21 +01:00
mirror.c	block: mirror - change string allocation to 2-bytes	2015-01-23 18:17:06 +01:00
nbd-client.c	nbd: Improve error messages	2015-02-06 17:24:22 +01:00
nbd-client.h	nbd: Improve error messages	2015-02-06 17:24:22 +01:00
nbd.c	nbd: fix max_discard/max_transfer_length	2015-02-06 17:24:22 +01:00
nfs.c	block/nfs: Add create_opts	2014-12-10 10:31:19 +01:00
null.c	block: Rename BlockDriverCompletionFunc to BlockCompletionFunc	2014-10-20 13:41:27 +02:00
parallels.c	block/parallels: fix access to not initialized memory in catalog_bitmap	2014-11-03 09:48:41 +00:00
qapi.c	block: add event when disk usage exceeds threshold	2015-02-06 17:24:21 +01:00
qcow2-cache.c	block: Give always priority to unused entries in the qcow2 L2 cache	2015-02-06 17:24:22 +01:00
qcow2-cluster.c	qcow2: Add two more unalignment checks	2015-01-23 18:17:05 +01:00
qcow2-refcount.c	block/qcow2: Make get_refcount() global	2014-11-03 11:41:49 +00:00
qcow2-snapshot.c	qcow2: Allow "full" discard	2014-11-03 11:41:47 +00:00
qcow2.c	block: fix off-by-one error in qcow and qcow2	2015-02-06 17:24:21 +01:00
qcow2.h	block/qcow2: Make get_refcount() global	2014-11-03 11:41:49 +00:00
qcow.c	block: fix off-by-one error in qcow and qcow2	2015-02-06 17:24:21 +01:00
qed-check.c	block: Use g_new() & friends to avoid multiplying sizes	2014-08-20 11:51:28 +02:00
qed-cluster.c	Use glib memory allocation and free functions	2011-08-20 23:01:08 -05:00
qed-gencb.c	block: Rename BlockDriverCompletionFunc to BlockCompletionFunc	2014-10-20 13:41:27 +02:00
qed-l2-cache.c	qed: do not evict in-use L2 table cache entries	2012-03-12 15:14:06 +01:00
qed-table.c	block: Rename BlockDriverCompletionFunc to BlockCompletionFunc	2014-10-20 13:41:27 +02:00
qed.c	qed: check for header size overflow	2015-02-06 17:24:21 +01:00
qed.h	qed: Really remove unused field QEDAIOCB.finished	2015-02-06 17:24:21 +01:00
quorum.c	block: Rename BlockDriverCompletionFunc to BlockCompletionFunc	2014-10-20 13:41:27 +02:00
raw_bsd.c	block: Make essential BlockDriver objects public	2014-12-10 10:31:19 +01:00
raw-aio.h	linux-aio: drop return code from laio_io_unplug and ioq_submit	2014-12-12 16:57:55 +00:00
raw-posix.c	block: use fallocate(FALLOC_FL_PUNCH_HOLE) & fallocate(0) to write zeroes	2015-02-06 17:24:20 +01:00
raw-win32.c	block: Make essential BlockDriver objects public	2014-12-10 10:31:19 +01:00
rbd.c	block/rbd: fix memory leak	2014-12-12 13:16:56 +00:00
sheepdog.c	block: Rename BlockDriverAIOCB* to BlockAIOCB*	2014-10-20 13:41:27 +02:00
snapshot.c	snapshot: add bdrv_drain_all() to bdrv_snapshot_delete() to avoid concurrency problem	2014-11-03 09:48:42 +00:00
ssh.c	ssh: Don't crash if either host or path is not specified.	2014-10-03 10:30:33 +01:00
stream.c	block: let stream blockjob run in BDS AioContext	2014-11-03 11:41:49 +00:00
vdi.c	block: remove BLOCK_OPT_NOCOW from vdi_create_opts	2014-12-10 10:31:20 +01:00
vhdx-endian.c	block: VHDX endian fixes	2014-08-15 15:07:14 +02:00
vhdx-log.c	block: Drop some superfluous casts from void *	2014-08-20 11:51:28 +02:00
vhdx.c	block: vhdx - force FileOffsetMB field to '0' for certain block states	2015-01-23 12:41:32 -05:00
vhdx.h	block: vhdx - update PAYLOAD_BLOCK_UNMAPPED value to match 1.00 spec	2014-12-12 15:42:22 +00:00
vmdk.c	block: vmdk - move string allocations from stack to the heap	2015-01-23 18:17:05 +01:00
vpc.c	block: remove BLOCK_OPT_NOCOW from vpc_create_opts	2014-12-10 10:31:21 +01:00
vvfat.c	block: update string sizes for filename,backing_file,exact_filename	2015-01-23 18:17:06 +01:00
win32-aio.c	block: Rename BlockDriverCompletionFunc to BlockCompletionFunc	2014-10-20 13:41:27 +02:00
write-threshold.c	block: add event when disk usage exceeds threshold	2015-02-06 17:24:21 +01:00